Apparatus adapted for the propulsion of fluids



July 26, 1938. BARNA 2,124,901

APPARATUS ADAPTED FOR THE PROPULSION OF FLUIDS Filed Jan. 16, 1937 Jnventor NICOLAS EF AR NA 5 I 4 a a Q .Qllrorney Patented July 26, 1938 UNITED ==STATES APPARATUS Nicolas Barns, Paris,

ADAPTED FOR THE PROPUL- SION F FLUIDS France, assignor of onehalf to Soclt les Fils dc Emile Salmson, Paris, France, a corporation of- France Application January 16, 1937, Serial No. 121,011 4 In fiance January 1'], 1936 30mins.

5 ment of a fluid in a piping and which, when at rest, still permit the outflow of the said fluid,

' such as the pumps which are more particularly used in hot water'heating plants.

More particularly the invention consists in providing a pumping member in motion on the piping, said member comprising, ports for the direct outflow of the fluid when atrest and valves adapted to close said ports when the said mem-' ber exerts its pumping action.

A particular form of construction of the invention applied to a centrifugal pumping memher is shown by way of non limitative example in the accompanying drawing, in which Figure 1 is a sectional view of the whole machine at rest. I 7

Figure 2 is a perspective view 01' the rotor. Reference character 2 designates the part of the pump body which is connected to the suction side; I shows the part which is fixedsto the delivery piping. I is the port through which the fluid which is pumped enters the part3 of the pumpbody on the delivery side. I illustrates the vane wheel, ii the scroll, I a rib of the wheel, I the bearing, I the shaft driving the vane wheel, and I the valves in their position when the machine is atrest.

Figure 2 shows the manner in which the vane.

wheel closing valves are arranged in order to act under the influence of centrifugal force. These 35. closing valves are rotatably mounted about axes I. A spring it maintains both valves I in the position shown when the machine isat rest and brings them to said position when the machine is. s ped- I a It law be noted that the devicedoes not require any special by-pass; the wheel directly draws fluid from the suction line 2 without any appreciable deviation and forces the fluid directly into the delivery pipe through the scroll ii and the ports i, the flap valves I then closing the cheeks of the wheel. The. device can be directly inserted in a straight portion of the piping. At rest the fluid flows from 2 towards I with the minimum of resistance owing to theaxial position of the device on the piping andto the large free section for the e in the wheel.

In the example shown centrifugal force is used for closing in operation and springs iI which are 56 conveniently arranged are used for opening at rest. Under the action of centrifugal force the flap valves I have a tendency to bend the springs II and rest, while turning about the axes I, on the delivery face of the wheel, thus closing the I0 nirect passage provided in the latter. So iongas the machine rotates, the e remains closed. At 7 rest centrifugal force vanishes and the springs, l0 cause both flap valves I to rotate in the opposite direction and openthe e. The seal of the flap valves I on the back face of the wheel is increased, during the operation, owing to the fact that the fluid pressure acts on said valves Iln the direction for closing the passage provided in the wheel.

' I claim: g 1

1. In a tubular fluid piping, a rotatable pumping member, having a main fluid v: 'e therethrough for pumping fluid from the inlet side to the delivery sideoi' said member, said member having by-pass ports for the direct c e of the fluid axially through said member, and two rocking flap valves mounted on the delivery side of the pumping member, said valves being actuated by centrifugal force towards port-closing position, for automatically closing said direct-passage and maintaining the same closed as soon as-the ,said member is set in motion, in order to permit its pumping action.

2. In a rectilinear tubular fluid pipin a rotatable pumping member having a main fluid passage therethrough for pumping fluid from the inlet side to the delivery side of'said member and rotating about a sloping axis convergent with the axis of the piping. said member having bypass ports for the direct e of the fluid axially through said member and two flap valves mounted'on the delivery side of the pumping member, said valves being actuated by centrif ugal force towards port-closing position, for

automatically ,closing said direct e and maintaining the same closed as soon as the said member is set in motion, in order to permit its pumping action.

3. In a conduit for fluids, a pump comprising a rotor for impelling liquid radially and provided .with a peripheral. passage for the fluid pumped, a casing having an inlet and an outlet at opposite sides of said rotor respectively and" having an annular passage cooperating with the peripheral passage in the rotor to receive the fluid pumped by the rotor, said annular passage discharging the pumped fluid at the outlet side of the rotor, said rotor having orifices formed position but permitting closing thereof under the 'action of rotation of the rotor.

1 ncome amas about the axis thereof for the direct flow of the resilient means urging said closures to an open 

